Table tennis deflection and drive mechanism

Abstract

The application belongs to the field of sports training instruments, and discloses a table tennis deflection hitting mechanism, which can exert a deflection torque on a training table tennis ball, simulates different angle cut ball serving of a table tennis server, greatly stimulates the fighting fun of a user, and significantly improves the experience of the user. The table tennis deflection hitting mechanism comprises a ball hitting unit, the ball hitting unit comprises a ball receiving part, a ball hitting rod and a deflection assembly, the ball receiving part is used for arranging the training table tennis ball, the ball hitting rod is used for hitting and launching the training table tennis ball, and the deflection assembly comprises a rotating ball guide cylinder and a ball cylinder driving rod. The rotating ball guide cylinder and the ball hitting rod are respectively located at two ends of the ball receiving part and linearly correspond to each other. The rotating ball guide cylinder is self-rotatable along the circumferential direction thereof. A friction deflection patch is attached to the inner wall of the rotating ball guide cylinder. A gear ring part is arranged on the outer circumferential surface of the rotating ball guide cylinder in the circumferential direction. The ball cylinder driving rod is provided with a driving gear wheel which is engaged with the gear ring part.

Description

Technical Field

[0001] This invention belongs to the field of sports training equipment, specifically relating to a table tennis ball deflection and firing mechanism. Background Technology

[0002] A table tennis serving device is a sports training instrument that can hold training table tennis balls and hit them one by one to simulate a player's serve. It is also an instrument used by the public for exercise and entertainment. Since my country is a major table tennis country and the enthusiasm of the general public for participating in table tennis is very high, table tennis serving devices have a very broad application prospect in my country. The table tennis hitting mechanism is one of the key components of a table tennis serving device.

[0003] Currently, the table tennis ball serving device draws training table tennis balls from bottom to top using a suction method, distributes the training table tennis balls one by one through a rotating turntable, and throws them out through high-speed rollers, thus realizing the function of serving training table tennis balls.

[0004] However, during use, the following shortcomings were found in the above implementation: the serving effect is too uniform, that is, it is difficult to simulate different ball speeds, different spins and different paths in reality, which affects the user's enjoyment of the game and greatly reduces the user's experience. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a ping-pong ball deflection and firing mechanism that can apply a deflection torque to a training ping-pong ball, simulating the different angles of a ping-pong server's slice serve, thereby greatly stimulating the user's competitive spirit and significantly improving the user's experience.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A ping-pong ball deflection and firing mechanism for deflecting and firing training ping-pong balls is characterized by comprising: a firing unit including a ball receiving component, a movable firing rod, and a deflection assembly; the ball receiving component is used to hold the training ping-pong ball, and the firing rod is used to strike and launch the training ping-pong ball; the firing rod faces the ball receiving component and is movable toward the ball receiving component; the deflection assembly includes a rotating ball guide tube and a ball tube drive rod, wherein the rotating ball guide tube and the firing rod are located at opposite ends of the ball receiving component and are linearly aligned; the rotating ball guide tube is rotatably arranged along its circumference and has a firing inlet and a firing outlet; the firing inlet is adjacent to the ball receiving component; a friction deflection patch is affixed to the inner wall of the rotating ball guide tube; and a circular, continuously closed toothed ring portion is provided on the outer circumferential surface of the rotating ball guide tube; one end of the ball tube drive rod has a drive gear that meshes with the toothed ring portion.

[0008] Preferably, the striking unit includes a striking assembly, which includes a horizontally extending guide rail, a drive gear, and a striking rod movably disposed on the guide rail. The striking rod has a rack segment extending horizontally. The drive gear is a non-perfect gear and meshes with the rack segment. The guide rail has an elastic fixing portion and a limiting portion located near the elastic fixing portion. The striking rod has an elastic expansion portion. The elastic fixing portion and the elastic expansion portion are elastically connected in a resettable manner through an elastic connector. Both the limiting portion and the elastic expansion portion are protrusion structures, and the limiting portion and the elastic expansion portion correspond to each other in the extending direction of the guide rail.

[0009] Furthermore, there are multiple drive gears, and the tooth segments of the multiple drive gears correspond to different envelope angles.

[0010] Furthermore, the striking assembly also includes a motor mounting base, a gear motor, and a movable gear shaft. The gear motor is mounted on the motor mounting base, and the output shaft of the gear motor is perpendicular to the extension direction of the guide rail. The movable gear shaft is a common shaft for multiple drive gears, and the movable gear shaft is coaxially and axially movablely connected to the output shaft of the gear motor via a coupling.

[0011] Furthermore, the ball receiving component has a ball receiving surface for setting up training ping-pong balls, and the ball receiving surface is adjacent to the guide rail and the rotating ball guide tube. The ball receiving surface is an arc surface that is concave inward along its own extension direction, and the ball receiving surface is inclined downward toward the guide rail. The ball receiving component also has two vertical and parallel ball blocking rods, which are located at the intersection of the ball receiving surface and the guide rail, and the distance between the two ball blocking rods is less than the diameter of the training ping-pong ball.

[0012] Preferably, the other end of the ball cylinder drive rod has a rotating lever, which drives the drive gear to rotate, thereby causing the rotating ball cylinder to rotate. The rotating lever is provided with multiple deflection position marks along its circumference.

[0013] Furthermore, the present invention also includes a device base shell, with the ball-hitting assembly and ball-receiving component located inside the device base shell, a deflection assembly passing through the device base shell, a device base, and the device base shell rotatably mounted on the device base. A swing assembly includes a geared motor, a drive linkage chain, and a rotary coupling component. The geared motor is mounted on the device base, the rotary coupling component is mounted on the device shell, one end of the drive linkage chain is located at the output end of the geared motor, and the other end is located on the rotary coupling component and on its vertical central axis. The drive linkage chain consists of three links with their ends sequentially hinged, and all three links extend horizontally. The geared motor drives the rotary coupling component to rotate via the drive linkage chain, thereby causing the device base shell to rotate horizontally relative to the device base.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. Because the ping-pong ball deflection and firing mechanism of the present invention includes a hitting unit, the hitting unit includes a ball receiving member, a hitting rod, and a deflection assembly, the ball receiving member is used to hold a training ping-pong ball, the hitting rod is used to hit and launch the training ping-pong ball, the deflection assembly includes a rotating ball guide tube and a ball tube drive rod, the rotating ball guide tube and the hitting rod are respectively located at both ends of the ball receiving member and are linearly corresponding, the rotating ball guide tube is rotatably arranged along its own circumference, a friction deflection patch is affixed to the inner wall of the rotating ball guide tube, and a toothed ring portion is provided along the circumference of the outer circumferential surface of the rotating ball guide tube, the ball tube drive rod... The rotating rod has a drive gear that meshes with the gear ring. When the training ping-pong ball is launched by the striking rod, it is launched outward through the rotating ball guide tube. During the launch process, the training ping-pong ball passes through the friction deflection patch. The friction deflection patch applies a deflection torque to the training ping-pong ball through the friction with the surface of the ball. Therefore, this invention can apply a deflection torque to the training ping-pong ball, that is, simulate the different angles of the ping-pong server's slice serve, thereby greatly stimulating the user's competitive fun and significantly improving the user's experience.

[0016] 2. Because the hitting unit of the present invention includes a hitting assembly, which includes a guide rail, a drive gear, and a hitting rod, the hitting rod has a rack segment, the drive gear is a non-complete gear and meshes with the rack segment, the guide rail has an elastic fixing part and a limiting part, the hitting rod has an elastic expansion part, the elastic fixing part and the elastic expansion part are elastically connected in a resettable manner through an elastic connector, and the limiting part and the elastic expansion part correspond to each other in the extension direction of the guide rail, the hitting mechanism of the present invention is simple to set, the impact force is stable and reliable, and the hitting trajectory of the training table tennis ball can be strictly maintained in accordance with the expected trajectory.

[0017] 3. Because the present invention has multiple drive gears, and the tooth segments of the multiple drive gears correspond to different envelope angles, the meshing lengths of the multiple drive gears and the rack segments are different, resulting in different elastic extension lengths of the striking rod relative to the guide rail, and different striking forces of the striking rod on the training ping-pong ball when the elasticity is released. Therefore, the present invention can conveniently adjust the initial acceleration of the training ping-pong ball.

[0018] 4. Because the ball-bearing surface of the present invention is a concave arc surface and the ball-bearing surface is inclined downward toward the guide track, and the ball-bearing component also has two ball-stopping rods, the ball-stopping rods are located at the intersection of the ball-bearing surface and the guide track, and the distance between the two ball-stopping rods is less than the diameter of the training ping-pong ball. The ball-stopping rods are used to stop the training ping-pong ball. Therefore, the present invention can stably and reliably stop the training ping-pong ball at the ball-stopping rods, thereby facilitating the impact and launch by the ball-striking rod.

[0019] 5. Because the present invention also includes a device base shell, a device base, and a swing assembly, the device base shell is rotatably mounted on the device base. The swing assembly includes a geared motor, a drive linkage chain, and a rotary coupling component. The geared motor is mounted on the device base, and the rotary coupling component is mounted on the device shell. One end of the drive linkage chain is mounted on the output end of the geared motor, and the other end is mounted on the rotary coupling component and located on the vertical central axis of the rotary coupling component. The geared motor drives the rotary coupling component to rotate through the drive linkage chain, thereby causing the device base shell to rotate horizontally relative to the device base. Therefore, the present invention can continuously change the serving direction within a certain angle range, that is, simulate the varied serving trajectories of a table tennis server, thereby greatly enhancing the competitive fun of the use process and further improving the user experience. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a ping-pong ball deflection and firing mechanism according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the device base shell in this embodiment. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the device base shell in this embodiment. Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the device base shell and the ball bearing component in this embodiment;

[0024] Figure 5 This is a schematic diagram of the striking assembly in this embodiment;

[0025] Figure 6 for Figure 5 Exploded view;

[0026] Figure 7 This is a schematic diagram of a movable gear shaft;

[0027] Figure 8 This is a schematic diagram of the movable connecting sleeve;

[0028] Figure 9a A schematic diagram of a single-headed V-shaped spring buckle;

[0029] Figure 9b A schematic diagram showing the fit of a single-headed V-shaped spring clip, a movable gear shaft, and a movable connecting sleeve;

[0030] Figure 10 This is a schematic diagram of the deflection component in this embodiment;

[0031] Figure 11 This is a schematic diagram of a swing assembly according to an embodiment of the present invention;

[0032] Figure 12 for Figure 11 A sectional view.

[0033] In the diagram: 100, Ping-pong ball deflection and firing mechanism; 10, Housing assembly; 121, Shielding structure; 13, Device base shell; 14, Coupling outer cylinder; 15, Device base; T, Training ping-pong ball; 21, Ball delivery channel; 30, Strike unit; 31, Strike assembly; 311, Guide track; 3111, Elastic fixing part; 3112, Limiting part; 312, Strike rod; 312a, Rack segment; 3121, Elastic expansion part; 313, Motor mounting base; 315, Drive gear; 317, Movable gear shaft; 3171, Stop through hole; C, Coupling; 318, Moving... Moving connecting sleeve, 3181, positioning through hole, V, single-headed V-shaped spring buckle, 319, gear rod, 32, ball bearing part, 321, ball bearing surface, 322, ball blocking rod, 33, deflection assembly, 331, rotating ball guide tube, 331a, ball hitting inlet, 331b, ball hitting outlet, 3311, friction deflection patch, 3312, gear ring part, 332, ball tube drive rod, 3321, rotating lever, 3321a, deflection position indicator, 3322, drive gear, 40, swing assembly, 41, geared motor, 42, drive linkage chain, 43, rotating coupling part, 431, rotating central shaft. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the ping-pong ball deflection and firing mechanism of the present invention. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0035] like Figures 1 to 3 As shown, the ping-pong ball deflection and firing mechanism 100 in this embodiment is used to deflect and fire a training ping-pong ball T, and includes a housing assembly 10, a hitting unit 30, and a swing assembly 40.

[0036] The housing assembly 10 includes a device base shell 13 and a device base 15. The device base 15 is placed horizontally, and the device base shell 13 is rotatably mounted on the device base. The device base shell 13 and the device base 15 are coupled sequentially from top to bottom. Specifically, the housing assembly 10 also includes a coupling outer cylinder 14.

[0037] The striking unit 30 includes a striking component 31, a ball receiving component 32, and a deflection component 33.

[0038] The ball-hitting component 31 and the ball-receiving component 32 are both located inside the device base shell 13, and the deflection component 33 is installed on the device base shell 13.

[0039] The ball receiving component 32 is used to set a training ping-pong ball T, and has a ball receiving surface 321 and a ball blocking rod 322.

[0040] like Figure 4 As shown, the ball-bearing surface 321 is used to hold the training ping-pong ball T, and the ball-bearing surface 321 is an arc surface that is concave inward along its own extension direction. In this embodiment, a ball-feeding channel 21 is provided directly above the ball-bearing surface 321, and the training ping-pong ball T falls from the ball-feeding channel 21 to the ball-bearing surface 321.

[0041] There are two ball-blocking rods 322, which are vertically parallel. The distance between the two ball-blocking rods 322 is less than the diameter of the training ping-pong ball T. The ball-bearing surface 321 is set to tilt downward. The training ping-pong ball T falling from the ball-feeding channel 21 falls onto the ball-bearing surface 321 and rolls downward along the concave arc surface to the space between the two ball-blocking rods 322, where it is stopped.

[0042] like Figure 5 and Figure 6 As shown, the ball-hitting assembly 31 includes a guide rail 311, a ball-hitting rod 312, a motor mounting base 313, a gear motor (not shown in the figure), a drive gear 315, and an elastic connector (not shown in the figure).

[0043] The guide rail 311 is set on the bottom surface of the device housing 13 and extends horizontally. The striking rod 312 is used to strike and launch the training ping-pong ball T which is stopped between the ball blocking rods 321. The striking rod 312 is horizontally movable on the guide rail 311 through a concave-convex fit. The striking rod 312 is oriented toward and movable toward the ball receiving member 32. The striking rod 312 has a rack segment 312a extending horizontally toward the ball receiving member 32.

[0044] The guide rail 311 has an elastic fixing part 3111 and a limiting part 3112 located near the elastic fixing part 3111. The striking rod 312 has an elastic expansion part 3121. The elastic fixing part 3111 and the elastic expansion part 3121 are elastically connected in a resettable manner through an elastic connector 315. Both the limiting part 3112 and the elastic expansion part 3121 are protrusion structures, and the limiting part 3112 and the elastic expansion part 3121 correspond to each other in the extension direction of the guide rail 311. Specifically, when the striking rod 312 moves on the guide rail 311, the limiting part 3112 is used to limit the striking rod 312.

[0045] The gear motor is mounted on the motor mounting base 313. The output shaft of the gear motor is perpendicular to the extension direction of the guide rail 311. There are multiple drive gears 315, which are coaxially arranged. The movable gear shaft 317 is a common shaft for multiple drive gears 315. The movable gear shaft 317 is coaxially and movably connected to the output shaft of the gear motor through the coupling C. The drive gears 315 are incomplete gears that mesh with the rack segment 312a. The tooth segments of multiple drive gears 315 have different envelope angles, that is, the meshing length between each drive gear 315 and the rack segment 312a is different. Specifically, the ball bearing surface 321 is inclined downward toward the guide rail 311, and the ball blocking rod 322 is located at the intersection of the ball bearing surface 321 and the guide rail 311.

[0046] Specifically, such as Figures 7 to 9b As shown, the ball-hitting assembly 31 also includes a movable connecting sleeve 318 and a gear rod 319. The movable connecting sleeve 318 is hollow, with one end coaxially fixed to the coupling C, and a movable gear shaft 317 inserted at the other end. Thus, the coupling C is connected to the movable gear shaft 317 through the movable connecting sleeve 318. The end of the movable gear shaft 317 inserted into the movable connecting sleeve 318 serves as the coupling end. The coupling end is hollow and has a stop hole 3171 circumferentially arranged. A single-headed V-shaped spring buckle V with its head passing through the stop hole 3171 is provided inside the coupling end. The movable connecting sleeve 318 has multiple positioning holes 3181 circumferentially arranged, corresponding to the stop hole 3171. When the movable gear shaft 317 moves linearly within the movable connecting sleeve 318, and the positioning holes 3181 and the stop hole 3171 coincide, the head of the single-headed V-shaped spring buckle V simultaneously passes through the positioning holes 3181 and the stop hole 3171. Hole 3171 is provided to fix the movable gear shaft 317 relative to the movable connecting sleeve 318. Multiple positioning through holes 3181 correspond to different fixed positions and different drive gears 315 and rack segments 312a. The end of the movable gear shaft 317 opposite to the coupling end is used as the pulling end. The gear pull rod 319 is fixed on the pulling end. When the movable gear shaft 317 is fixed relative to the movable connecting sleeve 318 and the gear pull rod 319 is pulled with a predetermined force, the smooth contour of the head of the single-headed V-shaped spring clip V slides out from the positioning through hole 3181, so that the movable gear shaft 317 continues to move linearly within the inserted movable connecting sleeve 318. In addition, the device housing 13 has an openable and closable housing side cover (not shown in the figure). Relevant personnel can operate the gear pull rod 319 by opening the housing side cover, thereby replacing the drive gear 315 that cooperates with the rack segment 312a.

[0047] like Figure 10As shown, the deflection assembly 33 includes a driving rotating ball guide cylinder 331 and a ball cylinder driving rod 332. The rotating ball guide cylinder 332 and the ball guide track 311 are located on both sides of the length direction of the ball receiving member 32 and are in a straight line correspondence. That is, the ball guide track 311, the ball receiving surface 321 and the rotating ball guide cylinder 332 are sequentially adjacent to each other.

[0048] The rotating ball guide tube 331 is rotatably arranged along its own circumference and has a ball inlet 331a, a ball outlet 331b, a friction deflection patch 3311, and a toothed ring portion 3312. Specifically, the cross section of the rotating ball guide tube 331 is circular and matches the training ping-pong ball T. In this embodiment, the rotating ball guide tube 331 is a straight tube.

[0049] The ball-hitting inlet 331a is adjacent to the ball-receiving member 32 and the ball-hitting inlet 331a is oriented in the extension direction of the ball-receiving surface 32. The ball-hitting outlet 331b faces the outside of the table tennis ball-serving device 100. Specifically, the ball-hitting outlet 331b is located on the surface of the device base shell 13.

[0050] The friction deflection patch 3311 is a piece with a high coefficient of friction with the ping-pong ball. It is attached to the inner wall of the rotating ball guide tube 331. Specifically, the friction deflection patch 3311 occupies less than or equal to 1 / 8 of the circumference of the inner wall of the rotating ball guide tube 331. When the training ping-pong ball T is hit, the training ping-pong ball T is launched outward through the rotating ball guide tube 311. During the launch process, the training ping-pong ball T passes through the friction deflection patch 3311. The friction deflection patch 3311 applies a deflection torque to the training ping-pong ball T through the friction with the surface of the training ping-pong ball T, thereby making the hit training ping-pong ball T have a chopping serve effect.

[0051] The gear ring portion 3312 is formed on the outer peripheral surface of the rotating ball guide tube 311 and is arranged in a continuous closed circular configuration along the circumferential direction.

[0052] The two ends of the ball cylinder drive rod 332 have a rotating lever 3321 and a drive gear 3322, respectively.

[0053] The drive gear 3322 meshes with the gear ring 3312. The rotating lever 3321 drives the drive gear 3322 to rotate by external force, thereby causing the rotating ball guide tube 331 to rotate. The rotating lever 3321 has multiple deflection position marks 3321a along its circumference. By rotating the rotating lever 3321 to the corresponding deflection position mark 3321a, the user can make the training ping-pong ball T have different spin patterns and slicing effects.

[0054] like Figure 11 and Figure 12 As shown, the swing assembly 40 includes a geared motor 41, a drive linkage chain 42, and a rotary coupling member 43.

[0055] The geared motor 41 is mounted on the device base 15, the rotary coupling 43 is mounted on the device housing 13, one end of the drive linkage chain 42 is mounted on the output end of the geared motor 41, and the other end is mounted on the rotary coupling 43 and located on the vertical central axis of the rotary coupling 43. The drive linkage chain 42 consists of three links with their ends hinged in sequence, and all three links extend horizontally. The geared motor 41 drives the rotary coupling 43 to rotate through the drive linkage chain 42, that is, the crank rocker mechanism is formed by the rocking assembly 40 of the drive linkage chain 42, so that the device base 13 reciprocates horizontally relative to the device base 15, thereby simulating the serve of a ping-pong ball with frequent changes in line.

[0056] Specifically, the rotary coupling member 43 is provided with a rotary central shaft 431 along its own vertical central axis. The end of the driving link chain 42 is fixedly sleeved on the rotary central shaft 431. Thus, when the end of the driving link chain 42 rotates, the rotary coupling member 43 is driven to rotate and swing through the rotary central shaft 431. The rotary coupling member 43 is rotatably set inside the coupling outer cylinder 14 through bearings, thereby ensuring the axial stability of the rotation of the rotary coupling member 43. Moreover, the coupling outer cylinder 14 also has a certain dustproof effect.

[0057] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. A ping-pong ball deflection and firing mechanism for deflecting and firing training ping-pong balls, characterized in that, include: The striking unit includes a ball-receiving component, a movable striking rod, and a deflection assembly. The ball-receiving component holds the training ping-pong ball, and the striking rod strikes and launches the training ping-pong ball. The striking rod is movable toward and towards the ball-receiving component. The deflection assembly includes a rotating ball guide tube and a ball tube drive rod. The rotating ball guide tube and the striking rod are located at opposite ends of the ball receiving member and are aligned in a straight line. The rotating ball guide tube is rotatable along its circumference and has a striking inlet and a striking outlet. The striking inlet is adjacent to the ball receiving member. The inner wall of the rotating ball guide cylinder is fitted with a friction deflection patch, and the outer circumferential surface of the rotating ball guide cylinder is provided with a continuously closed circular gear ring. One end of the ball cylinder drive rod has a drive gear that meshes with the gear ring. The striking unit includes a striking assembly comprising a horizontally extending guide rail, a drive gear, and a striking rod movably mounted on the guide rail. The striking rod has a horizontally extending rack segment, and the drive gear is a non-perfect gear that meshes with the rack segment. The guide rail has an elastic fixing part and a limiting part located near the elastic fixing part. The striking rod has an elastic expansion part. The elastic fixing part and the elastic expansion part are elastically connected in a resettable manner through an elastic connector. Both the limiting part and the elastic expansion part are protrusion structures, and the limiting part and the elastic expansion part correspond to each other in the extension direction of the guide rail. The ping-pong ball deflection and firing mechanism also includes a device base, a device base, and a swing assembly. The ball-hitting assembly and the ball-receiving component are both located inside the device's base shell, while the deflection assembly passes through the device's base shell. The device base shell is rotatably mounted on the device base. The swing assembly includes a geared motor, a drive linkage chain, and a rotary coupling component. The geared motor is mounted on the device base, and the rotary coupling component is mounted on the device housing. One end of the drive linkage chain is located at the output end of the geared motor, and the other end is located on the rotary coupling component and on its vertical central axis. The drive linkage consists of three links that are hinged at their ends in sequence, and all three links extend horizontally. The geared motor drives the rotary coupling to rotate through the drive linkage, thereby causing the device base shell to rotate horizontally relative to the device base.

2. The ping-pong ball deflection and firing mechanism according to claim 1, characterized in that: in, The number of drive gears is multiple, and the tooth segments of the multiple drive gears correspond to different envelope angles.

3. The ping-pong ball deflection and firing mechanism according to claim 2, characterized in that: in, The ball-hitting assembly also includes a motor mounting base, a gear motor, and a movable gear shaft. The gear motor is mounted on the motor mounting base, and the output shaft of the gear motor is perpendicular to the extension direction of the guide rail. The movable gear shaft is a common shaft of the plurality of drive gears, and the movable gear shaft is coaxially and movably connected to the output shaft of the gear motor via a coupling.

4. The ping-pong ball deflection and firing mechanism according to claim 1, characterized in that: in, The ball-receiving component has a ball-receiving surface for setting the training ping-pong ball, and the ball-receiving surface is adjacent to the guide rail and the rotating ball-guide tube. The ball-receiving surface is an inwardly concave arc surface along its own extension direction, and the ball-receiving surface is inclined downward toward the guide rail. The ball-receiving component also has two vertical and parallel ball-blocking rods. The ball-blocking rods are located at the intersection of the ball-receiving surface and the guide rail, and the distance between the two ball-blocking rods is less than the diameter of the training ping-pong ball.

5. The ping-pong ball deflection and firing mechanism according to claim 1, characterized in that: in, The other end of the ball cylinder drive rod has a rotating lever, which drives the drive gear to rotate, thereby causing the rotating guide ball cylinder to rotate. The rotating lever has multiple deflection position markings along its circumference.

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